Two people can shop for the same health plan and see very different monthly prices. For ACA-compliant individual and family plans, that difference comes from a short list of factors insurers are allowed to use. This guide explains each one, the federal limits on how much it can move your price, and what insurers aren’t allowed to consider.
What Factors Affect Your Health Insurance Premium?
For Marketplace and other ACA-compliant individual plans, insurers can base your premium on only five factors: your age, where you live, tobacco use, whether the plan covers just you or your family, and the plan category you choose.
HealthCare.gov lists these in its explanation of how insurance companies set health insurance premiums. It also notes that states can limit how much these factors affect what you pay. Rules for job-based coverage work differently, because the employer usually pays part of the premium.
How Does Age Affect Your Premium?
Premiums generally rise with age, but federal rules limit the difference: an older adult can be charged no more than three times what a young adult pays for the same plan.
This is sometimes called the “3-to-1 age band.” Prices usually climb gradually year by year rather than jumping at a single birthday. Some states set a tighter limit than the federal one. Since premium tax credits are based on income, not age, the credit for an eligible older person can be larger, which offsets part of the higher price.
How Does Where You Live Affect Your Premium?
Location is often one of the biggest factors, because local healthcare prices, insurer competition, and state rules vary widely from one area to another. Two people of the same age buying a similar plan can pay very different amounts just because they live in different counties or states.
Your available plans and insurers also depend on your location. That’s why national averages are only a rough guide, and the real numbers come from shopping in your own ZIP code.
How Does Tobacco Use Affect Your Premium?
Insurers can charge tobacco users up to 50% more than non-users for the same plan. Some states ban or reduce this surcharge, and insurers can set it lower than the federal maximum.
A few points to know:
- The surcharge generally applies to regular tobacco use, based on how you answer the application question.
- Premium tax credits don’t cover the tobacco surcharge, so tobacco users who qualify for help usually pay the extra amount themselves.
- Answer the tobacco question accurately. Giving false information on an insurance application can cause problems with your coverage later.
How Do Family Size and Plan Category Affect Your Premium?
Adding a spouse or dependents to your plan raises the total premium, because each covered person adds cost. The plan category you pick also changes the price.
Bronze plans usually have the lowest premiums and the highest costs when you use care, and Platinum plans usually work the other way around. For a full comparison of how each tier trades premium against out-of-pocket costs, see how the Bronze, Silver, Gold, and Platinum tiers differ.
What Can’t Insurers Use to Set Your Premium?
Insurers can’t charge you more for an ACA-compliant plan because of your health, your medical history, or your sex. These protections apply to Marketplace plans and other ACA-compliant individual plans.
- Health and medical history: A pre-existing condition can’t raise your premium or be used to deny you coverage.
- Sex: Men and women pay the same price for the same plan.
- Other factors common in auto insurance: Things like credit score or occupation aren’t on the list of allowed rating factors for these plans.
Plans that aren’t ACA-compliant, such as short-term health plans, may follow different rules, so check what protections apply before you buy one.
What Affects What You Actually Pay Each Month?
Your income doesn’t change the plan’s listed price, but it can change what you actually pay through a premium tax credit. If you qualify, the credit lowers your monthly bill, and it’s based on your expected household income and the cost of a benchmark Silver plan in your area.
That means two people with the same listed price can pay very different amounts after financial help. For how premiums, deductibles, and the current subsidy rules fit together, see what health insurance is expected to cost in 2027.
Frequently Asked Questions
Can a health insurer charge me more because of a pre-existing condition?
Not for a Marketplace plan or other ACA-compliant individual plan. Insurers can’t charge more or refuse coverage based on your health or medical history. Plans that aren’t ACA-compliant, such as short-term plans, may not have the same protections.
How much more do older people pay for health insurance?
Under federal rules, insurers can charge older adults no more than three times what they charge young adults for the same plan. Some states set a tighter limit. Premium tax credits, if you qualify, can offset part of the higher price.
Does my credit score affect my health insurance premium?
No, not for ACA-compliant individual plans. The only factors insurers can use are age, location, tobacco use, individual vs. family enrollment, and plan category.
Does vaping count as tobacco use for health insurance?
It depends on how the insurer and your state define tobacco use on the application. Read the tobacco question carefully and answer it accurately. If you’re unsure, ask the Marketplace or the insurer how they define it.
This article is for informational purposes only and does not constitute insurance, legal, or financial advice. Insurance products, rates, and terms vary by state and insurer; consult a licensed agent or your policy documents before making coverage decisions.